Cross-shell excitations near the 'Island of Inversion': structure of $^30Mg$

A.N. Deacon, J.F. Smith, S.J. Freeman, R.V.F. Janssens, M.P. Carpenter, B. Hadinia, C.R. Hoffman, B.P. Kay, T. Lauritsen, C.J. Lister, D. O'Donnell, J. Ollier, T. Otsuka, D. Seweryniak, K.M. Spohr, D. Steppenbeck, S.L. Tabor, V. Tripathi, Y. Utsuno, P.T. WadyS. Zhu

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Excited states in 30Mg have been populated to ~6ℏ and 5 MeV excitation energy with the 14C(18O,2p) reaction. Firm spin assignments for states with J>2ℏ have been made in this nucleus. The level scheme is compared to shell-model calculations using the Universal sd effective interaction and the Monte Carlo shell model method. Calculations employing a full sd model space fail to reproduce the observed levels. The results indicate that excitations across the N=20 gap are required at relatively low excitation energy to achieve a description of the data. The incorporation of the f7/2 and p3/2 orbitals into the model space gives improved results but indicate the need for further refinement of the models to reproduce the observed spectra.
Original languageEnglish
Article number034305
JournalPhysical Review C
Issue number3
Publication statusPublished - 7 Sep 2010


Cite this

Deacon, A. N., Smith, J. F., Freeman, S. J., Janssens, R. V. F., Carpenter, M. P., Hadinia, B., Hoffman, C. R., Kay, B. P., Lauritsen, T., Lister, C. J., O'Donnell, D., Ollier, J., Otsuka, T., Seweryniak, D., Spohr, K. M., Steppenbeck, D., Tabor, S. L., Tripathi, V., Utsuno, Y., ... Zhu, S. (2010). Cross-shell excitations near the 'Island of Inversion': structure of $^30Mg$. Physical Review C, 82(3), [034305].